Mr. ConCon, or called as simply ConCon, is a Luigi main who is considered to be one of the best Smash 4Luigi players alongside Elegant, but was widely considered to be the best prior to patch 1.1.1. He is the first person to ever take a set off of ZeRo, defeating him 3-2 in set 1 of grand finals of Smash 4 Oomba 5/1, although ZeRo ended up beating him 3-0 in set 2 with Sheik. He is known as one of the best mashers in the game, able to reach full lift with Luigi's down special consistently, as well has having one of the most creative recovery mixup games on a character considered to have awkward difficulty recovering.

While not necessarily a player deemed as "salty", he is often known for his outbursts at Mega Smash Mondays #56 and EVO 2016 after having lost both sets, the former against K9sbruce during grand finals and the latter against CaptAwesum in pools.

Mr. ConCon is known for popularizing the phrase "I'm back, baby!" each time he starts to place decently high at a tournament, only to lose soon after (often followed by fellow Luigi main, Elegant, outplacing him). This has become a meme within the Smash community.